New York is where financial products get tested the hardest. Your users might be traders who expect instant screens, small business owners chasing faster payouts, retail customers who think twice before every new login, or compliance teams who read every line of an audit trail. Squalix designs, builds, launches and maintains fintech and blockchain apps for New York startups, lenders, wealth firms, payment companies and established financial institutions, with security and regulation planned in from the first sprint.
A fintech app moves money and holds identity data, so a weak spot is never just a bug. We plan encryption, key management, access control and audit logging at the architecture stage, and we map the build against PCI DSS, SOC 2 and the NYDFS cybersecurity rules that many New York firms have to follow.
Banking and payment apps are public facing, and inaccessible ones draw complaints and legal claims. We design to WCAG standards from the first wireframe, covering contrast, screen readers and clear error messages, because retrofitting it after launch costs far more than building it in.
One product often serves a first-time saver on a phone and a finance team reconciling hundreds of transactions on a desktop. We design flows for both groups and test them with real people instead of assuming how they behave.
Sponsor banks, card processors, compliance officers and legal reviewers all get a say before launch. We build the plan around those dependencies so one pending sign-off doesn't freeze the rest of the project.
As a custom fintech app development company, we build secure, scalable financial software for teams that need to launch a new product, replace an ageing system or add payments and digital assets to what they already run. Each engagement starts with your users and your regulators, and the technology choice follows from there.
Mobile banking, neobank and personal finance apps for iOS, Android and web. We handle onboarding, account views, transfers and notifications, and we connect them to your core systems or a banking-as-a-service partner.
Card, ACH and wallet payments built on providers such as Stripe, Plaid, Adyen and Marqeta. We focus on payment success rates, retries, reconciliation and clear failure messages, not just the happy path.
Loan origination, credit decisioning, repayment schedules and collections tools. We build the borrower app and the back-office screens together so underwriters and customers work from the same data.
Portfolio dashboards, robo-advisory flows, brokerage and trading interfaces with live market data. We pay close attention to latency, chart accuracy and the disclosures regulators expect users to see.
Identity verification, transaction monitoring, AML checks and audit trails wired into the product. Compliance teams get the reports they need without engineers pulling data by hand every quarter.
Machine learning for fraud scoring, credit risk, spending insights and document processing, plus conversational assistants for customer support. We keep a human review step wherever a wrong decision would cost a customer money.
Blockchain app development for wallets, tokenized assets, DeFi products, payment rails and smart contracts on Ethereum, Polygon, Solana or Hyperledger. We start by checking whether you need a blockchain at all, and we plan for independent smart contract audits and the licensing questions New York raises.
Launch is the start of the work, not the end. We handle OS updates, dependency patches, security fixes, performance monitoring and new features after release, so your app keeps passing reviews and audits.
Our team has worked across fintech, healthcare, commerce and logistics, using current technology to help businesses launch products that earn user trust and hold up under real transaction volume.
If you don't need a custom app, we'll say so. If you don't need a blockchain, or a cross-platform build will do the job, we won't push you toward the pricier option.
No handoff gaps between the people who design your app and the people who build it, which matters when a single payment screen carries legal wording.
Encryption, secure authentication, key management and careful data handling are part of the build, not an add-on, and we plan for PCI DSS and SOC 2 expectations early.
We build so the app can grow from a few hundred users to many thousands, and from a few transactions a day to a few per second, without a rewrite.
Our team stays with your product after launch, covering patches, monitoring and compliance-driven changes.
We work with teams across the US from our development base, so you get a dedicated team without the overhead of a Manhattan agency. Calls, standups and demos are scheduled around US Eastern hours, and we communicate over Slack, email and video calls, so you always know who is working on what and what ships next.
We talk through your goals, users, budget, licensing position and timeline, and we tell you if an idea needs adjusting before you spend money on it.
Wireframes and clickable prototypes you can review early, including the awkward screens like failed payments and identity checks, so changes are still cheap.
Agile sprints with regular demos. You see working software every couple of weeks, with security reviews built into each cycle instead of saved for the end.
Real-device testing, penetration testing, load testing on payment flows and, for blockchain products, an independent smart contract audit before anything goes live.
We handle App Store and Google Play submission, including the financial app review requirements that trip up first-time publishers, and we plan a staged rollout.
Ongoing updates, monitoring and improvements as your user base and transaction volume grow.
We pick tools that suit the actual problem, not the latest trend. Expand below to see the full set of mobile, backend, cloud, payment and blockchain technologies we use for fintech and Web3 work.
Reliable and scalable databases for modern applications.
MySQL
PostgreSQL
MongoDB
Redis
FirebasePowerful and flexible backend solutions for high performance.
Node.js
NestJS
PHP
PythonSecure, scalable and automated infrastructure for growth.
AWS
Kubernetes
Google Cloud
AzureModern and interactive user interfaces for seamless experiences.
React.js
TypeScript
Next.js
Vue.js
Three.jsCross-platform mobile apps for better engagement.
React Native
Flutter
SwiftLearning apps, student portals and training platforms for universities and professional programs. More on EdTech app development.
On-demand and logistics. Booking, tracking and dispatch apps. Our ShowFar ride-hailing platform is one example of live GPS and cashless payments working together.
Launch high-performance OTT and video streaming platforms at scale. Enable low-latency streaming, DRM protection, and content monetization. Use AI-powered recommendations to boost engagement and user retention.
Listing apps, virtual tours and CRM-connected tools for agents and property managers. See real estate app development.
Whether you have a fully scoped idea or just a rough concept, we're happy to talk it through. Tell us about your fintech or blockchain project and we'll get back to you with practical next steps, not a sales script.
Fragrance
Akal Attar wanted a website that didn't feel like every other perfume shop online — their whole thing is traditional, alcohol-free attar made the old way, in small batches, so the site had to look and feel a bit different too. We went with a calmer, warmer palette instead of the usual glossy e-commerce look, kept the layout simple so the products actually get noticed, and made sure product pages clearly show where ingredients come from and whether they're skin-safe, since that's what attar buyers actually care about, especially on mobile where most visitors land first. Behind the scenes we focused on the stuff that doesn't show up visually but matters for growth — fast load times, clean URLs, proper meta descriptions, and targeting searches like 'natural attar online' and 'alcohol-free perfume India' — plus a simple checkout, easy-to-browse categories, and a backend the client can update on their own without needing a developer every time. Nothing fancy, just built to work, since the fragrance itself was already special and the website's job was just not to get in the way of that.
Explainable AI text detection & authenticity suite
VeltrixQuill AI is an advanced AI text detection platform designed to analyze and identify whether a given text is human-written or AI-generated. The system uses state-of-the-art natural language processing models to evaluate linguistic patterns, semantic structures, and probabilistic scoring to deliver highly accurate classification results. Each analysis is supported with explainable insights, allowing users to understand why a piece of content is classified as AI-generated or human-written. The platform is built for teams, enabling collaborative review, shared detection reports, and centralized content verification workflows. VeltrixQuill AI helps organizations maintain content authenticity, reduce misinformation risks, and improve trust in digital communication by providing fast, scalable, and transparent AI detection capabilities.
Answers to what New York founders, lenders and finance teams ask us most before starting a fintech or blockchain app project.
